2,6-Difluoro-1-benzenecarbonyl isothiocyanate was prepared using commercially available 2,6-difluoro-1-benzenecarbonyl chloride (80 mg) as a starting compound according to the description of the literature. 2,6-Difluoro-1-benzenecarbonyl isothiocyanate was dissolved in ethanol (1 ml) to prepare a solution. 3-Chloro-4-[(6,7-dimethoxy-4-quinolyl)oxy]aniline (50 mg), toluene (5 ml), and ethanol (1 ml) were added to the solution, and the mixture was stirred at room temperature for 2 hr. The reaction solution was concentrated, and the residue was purified by chromatography on silica gel using chloroform/acetone for development to give the title compound (59 mg, yield 74%). 1H-NMR (DMSO-d6, 400 MHz): δ 3.94 (s, 3H), 3.96 (s, 3H), 6.57 (d, J=4.64 Hz, 1H), 7.11–7.51 (m, 4H), 7.62–7.64 (m, 1H), 7.80–7.83 (m, 2H), 8.08 (m, 1H), 8.52 (d, J=5.12 Hz, 1H), 12.16 (s, 1H), 12.28 (s, 1H) Mass spectrometry value (ESI-MS, m/z): 530 (M++1)
